| Country | Action | Action Date | Effective Date |
|---|
| BRAZIL | Signature | 06/11/1925 | |
| BRAZIL | Accession | 26/10/1929 | |
| CUBA | Signature | 06/11/1925 | |
| CZECHOSLOVAKIA | Signature | 06/11/1925 | |
| CZECHOSLOVAKIA | Accession | 03/03/1933 | |
| DANZIG | Signature | 06/11/1925 | |
| DANZIG | Accession | 29/10/1930 | |
| DOMINICAN REPUBLIC | Accession | 06/04/1951 | |
| FRANCE | Signature | 06/11/1925 | |
| FRANCE | Accession | 20/10/1930 | |
| FRANCE | Declaration | 20/10/1930 | |
| GERMANY | Signature | 06/11/1925 | |
| GERMANY | Ratification | 01/05/1928 | |
| HUNGARY | Accession | 05/06/1934 | |
| LIECHTENSTEIN | Accession | 14/07/1933 | |
| MOROCCO | Signature | 06/11/1925 | |
| Morocco | Extension | 05/11/1928 | |
| MOROCCO | Accession | 21/10/1930 | |
| NEW ZEALAND | Accession | 10/01/1933 | |
| Palestine | Extension | 12/09/1933 | |
| POLAND | Accession | 10/12/1928 | |
| PORTUGAL | Signature | 06/11/1925 | |
| PORTUGAL | Accession | 13/05/1931 | |
| SPAIN | Signature | 06/11/1925 | |
| SPAIN | Ratification | 01/05/1928 | |
| Spanish Colonies | Extension | | 15/12/1947 |
| SWEDEN | Accession | 01/01/1934 | |
| SWITZERLAND | Signature | 06/11/1925 | |
| SWITZERLAND | Ratification | 01/05/1928 | |
| SYRIA & GRAND LEBANON | Signature | 06/11/1925 | |
| SYRIA & GRAND LEBANON | Accession | 17/11/1930 | |
| TANGANYIKA | Accession | 06/03/1936 | |
| Trinidad And Tobago | Extension | 21/10/1929 | |
| TUNIS | Signature | 06/11/1925 | |
| TUNIS | Accession | 20/10/1930 | |
| TURKEY | Accession | 21/08/1930 | |
| UNITED KINGDOM | Signature | 06/11/1925 | |
| UNITED KINGDOM | Ratification | 01/05/1928 | |